1TB? 100G should be plenty for MAME. A smaller solid-state drive will run faster and be much better for MAME.
Use that big guy in an HTPC or something.
What advantage does a SSD drive offer when it comes to MAME other than a fast boot time for your cab?
MAME isn't the only emulator.
It's pretty common for people with full romsets for most consoles to have 2-3TB drives in their cabs.
The GD-Rom(NAOMI) & hard drive based arcade games eat up space quickly.
Full sets of optical-drive based console games take up a ridiculous amount of space.
The high quality video previews I'm using on my cab eat up 20GB and my setup is limited to arcade games. (had to have higher quality for the sound quality)
If someone is running Hyperspin and has themes and video previews for every game on every console, that takes up a major chunk of space.
My current build is limited to only working
arcade games and the emulators folder weighs in at around 150GB.
I also have The PC versions of Super Street Fighter IV AE (8GB) & Street Fighter X Tekken (4GB).
I could probably squeak by with a 256GB SSD, but it wouldn't leave a whole lot of room for future expansion.